i need help with this question please!

Answer:
5.7 cm
Step-by-step explanation:
Triangle
Measurements: 9 cm, 14 cm, y cm
14 cm/2= 7 cm
a²+b²=c²
7²+b²=9²
49+b²=81
-49 -49
b²= 32
b= 5.656854249
y= 5.7
Answer:
Your answer is 11.4
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